Chimney cap and ventilator.



O. B. MADISON.

OHIMNBY GAP AND VENTILATOR.

APPLIOATION FILED 1120.21, 1011.

WJTJVESE@ ZNVENTOR TTOJJVE Y OLE B. MADISON, OF ST. JOHNS, OREGON.

CHIMNEY CAP .AND VENTILATOR.

Specification of Letters Patent.

Application led December 21, 1911.

Patented Aug. 6,1912. Serial No. 667,228.

T0 all who/m. if may concern Be it known that I, OLE B. MADISON, citizenof the United States, residing at St. Johns, in the county of Multnomahand State of Oregon, have invented certain new and useful Improvementsin Chimney Caps and Ventilators, of which the following is aspecification.A

My invention pertains to chimney caps and ventilators, and is designedto prevent rain or down currents of air from entering the chimney.

A further object is to gather the currents of air about the chimney andso control them that the air striking the chimney top will always movein an upward direction and thereby produce a normal draft.

These and other objects are accomplished by the mechanism illustrated inthe accompanying drawing, in which* Figure 1 is a plan view of thedevice showing the cap and u-pper truncated cone partly broken away,also the horizontal wing 14, with its radial vanes; Fig. 2 is a verticalsectional view showing the elements of structure of the several parts,the wing 14, with its guide-vanes being shown at one side only.

Referring to the drawing in detail, l designates a collar adapted to befitted upon the top of the chimney 2. To the upper edge of the collar issecured upon brackets 11, a truncated cone 13, which stands, withreference to the collar, at an angle of approximately 45 degrees, and ithas a horizontal width approaching that of the collar. Above cone 13, ata distance approximately equal to the width of the collar is placed asecond truncated cone 4, similar in all respects to cone 18, and securedin place thereon by vanes, or partitions 3, fixed between said cones, s0that their ends stand substantially in line with their respective edgesof the cones. v

To the upper edge 9 of the cone 4 are fixed brackets S, upon which issupported the cap 6, which has a cone-shaped upper surface, and isprovided in its lower portion with a base 7, which forms a deflector todirect the upward currents of air outward, from the chimney. The base issecured to the edge 5 of the cap.

To the lower edge o f cone 4 is secured the horizontal wing 14, whoseinner edge 15 conforms to that of the cone. The wing is placed in linewith the upper edge 10 of the lower cone, as indicated by the arrow h,and

is made slightly wider than the vertical distance between said cones;and it is sustained in place by radial vanes 17. A support 12 also, maybe added to strengthen the parts. The vanes o1' bracket 17, in additionto supporting the wing 14, serve to prevent the horizontal currents ofair which strike upon the cone 4 from being deflected laterally, anddirects such currents across the edge 9 and over the top of the chimney.

The purpose of wing 14 is to prevent the down currents of air fromsweeping the outer edges of the cones 13 and 4, and there- 'by produce asuction downwardly in the space between them, and consequently, a downdraft in the chimney. If the line of movement is directly downward pastthe wing it will not strike the lower cone and, hence, will not producea suction. And if the direction of the current is varied until itreaches that of the arrow f it still will not produce a down draft,because it does not strike the lower edge of the air chamber. But whenthe Vcurrent approaches the horizontal sufliciently to strike the lowercone, as indicated by arrow g, it must strike it at an acute angle, andwill therefore, be deflected upwardly through the ventilator. Anycurrent, accordingly, which will strike the lower cone, will tend to theproduction of an upward draft in the chimney.

The normal horizontal current of air striking the vanes or partitions 3,as shown by arrow a, will be gathered toward their inner ends anddirected upwardly over the chimney, the body of the current passing in adirect line, without lateral deflection, as shown at Z).

The cap or upper cone is made of such width that any downward currentpassing the edge 5` thereof, which will pass above the edge 9 of cone 4,will pass out between the partitions 3, above the edge 10 of cone 13, sothat it is impossible for rain or air currents entering above cone 4 tostrike within the chimney. Direct horizontal currents will passunobstructed beneath the cap, as shown at (l. The lower edge of cone 4being in line with the upper edge of cone 13, renders it impossible forcurrents pass' ing between said cones to enter the chimney.

If the cap consisted simply of the cone 6, the upward currents directedagainst it would gather therein, and under certain conditions would bedeflected downward into the chimney. I have therefore, provided thehorizontal plate or deflector 7, so

that the upward currents rising through the ventilator will alwaysstrike it at an acute angle and be deflected outwardly, as at e.

By the arrangement I have shown, the horizontal currents of air are,gathered toward the center of the device and directed upwardly over thechimney. It is impossible for currents entering; from any direction tobe deflected into the chimney. It is impossible also for currents tosweep the edges of the lower cones and thus cause a downward suctionthrough the chambers between them.

Having thus described my invention, what I claim as new, is-

l. A chimney cap and ventilator comprisingg,` a collar, a truncated conesecured by its top to the top of said collar, partitions secured inradial position upon said cone, al similar cone secured on saidpartitions, a

cap secured in spaced relation above said` cones, and a horizontal wing;secured to the lower edge of the upper cone.

2. A chimney cap and ventilator com prising a collar, a truncated conesecured by its top to the top of said collar, partitions secured inradial position upon said cone, a similar cone secured upon saidpartitions, guide-vanes secured in radial position on the upper cone,the base of said vanes being formed in the horizontal plane of the baseof said cone, a horizontal wing' fixed upon the bases of said vanes, anda cap fixed above said cones, whereby currents of air are excluded fromthe chimney.

3. The combination in a chimney cap and ventilator, of a collar, atruncated cone secured by its top to the top of said collar, partitionssecured in radial position upon said cone, a similar cone secured uponsaid partitions, a horizontal wing` secured at the base of the uppercone, and a cap comprising a cone having a broad horizontal baise,whereby down currents are prevented from entering; the chimney and therising currents are deflected outwardly, secured centrally above saidcones.

In testimony whereof I afiix my signature in presence of two witnesses.

OLE B. MADISON.

Witnesses:

WV. Gr. KING FRED M. FERRELL.l

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

